Payments Pending

A practical guide to payments engineering: Stripe and PayPal patterns, webhooks, idempotency, refunds, and testing money flows safely.

Owning Session State Across Stripe and Kalshi Auth Flows in Integration Tests

Test stateful APIs by explicitly owning credentials and session state across API boundaries.

Validate bot strategies against Kalshi's stateful fill sequences rather than stateless mocks.

Latest

Cleaning up your stripe integration? See how finance teams cut days off the close and kill the manual busywork.

A guide to safely migrating from Stripe's deprecated Charges API to PaymentIntents.

Sandbox success doesn't guarantee production readiness without strategic gap testing.

Understanding PayPal's state machine prevents payment failures during order processing.

Build webhook handlers that tolerate late, duplicate, and out-of-order PayPal events.

Stripe subscriptions are state machines where proration is a per-call choice, not automatic.

Choosing stripe integration software? Start with the criteria that actually matter — data integration first, demos last.

Stripe Integration